Beyond the Ariel

[EarlK]

Originally Posted by GM

WRT distortion testing, I've no experience or even considered it since I don't recall seeing anything published by Altec in either cut sheets or in tech bulletins beyond recommending that in any type of high power app the speaker's components be limited to a decade, implying that in any consumer app short of a frat party it was a non-issue, so wondering what the distortion looks like when the driver is BW limited 2nd order to 500-5k, etc..

- Looks to me like 1K to 10K is a more realistic BW ( for distortion products, when aligning diaphragms ) .





- ( Obviously from above ) Altec did publish a few distortion specs ( for their later drivers bolted onto their horns ) / granted, specs are few & far between .

- I suppose I might moderate the goal ( of a 15db spread between H2 & H3 ) down to 12db ( to match Altecs own stats ) / but heck / all these newer horns/waveguides ( sans diffraction slot ) are widely touted for their lower distortion , so why not shoot for a 15db spread to see if it's achievable ?

<> EarlK

[Pano]

Originally Posted by GM

I didn't 'hone' the response per se, I align honed the driver, steel shim and horn entrance with a three stone brake master cylinder hone attached to an electric drill to make the transitions as seamless/smooth as practical.

LOL! OK, you really did hone them. Make sense, I just didn't take you literally. Porting and polishing the horns, eh? Real audio hot-rodding is cool.

[TerryO]

Originally Posted by Pano

LOL! OK, you really did hone them. Make sense, I just didn't take you literally. Porting and polishing the horns, eh? Real audio hot-rodding is cool.

Wait until you see the tuned extractor pipes!

[AuroraB]

Originally Posted by TerryO

Wait until you see the tuned extractor pipes!

triple chrome plated ???

[Ed LaFontaine]

For chrome you pay extra:



The pipes are the ports. Courtesy of Pellegrene Acoustics

acoustic waveguides

[Tom Danley]

Originally Posted by TerryO

Wait until you see the tuned extractor pipes!

I didn't think to chrome these but it would have been a nice surprise when they took the lid off haha.
Best,
Tom Danley
pix at 2739

Collaborative Tapped horn project

[charliemb]

Originally Posted by IslandPink

Lynn, and Bud .
A relevant ( hopefully ) post here .
If you think you've sorted the speaker wire issue with Bud's Litz/cotton specials , I've got bad news for you !
Just bought some Tellurium Q Blue speaker cable, and now have some 'Black' on loan which is running-in and playing as we speak .
This company is making waves here in the UK , 5-star reviews on all their stuff . The Black costs about £300 for a 3m pair , unfortunately, for us DIY fans ...

My comments here if you are interested :
Colin Wonfor - Page 3 - World-Designs-Forum

Mark, you have no idea how timely this post is for me. I'm looking into this litz / cotton world and frankly unless I want to spend $1k for a larger quantity than I need (new), finding litz to the 99.99 spec is not so easy. ...nor is the cotton.

I was hoping I could start with a kick-*** DIY cable and only then invite the commercial stuff to compete (and with a return policy). But because of the low price of the TQ cables you mentioned above, one possibility is to start out with the TQ and then have the litz/cotton attempt to compete. I will have to rearrange things in my house before I can proceed with the right length of cables. In the meantime, I can follow things and see how they develop. Same goes for this speaker.

[charliemb]

Originally Posted by charliemb

Mark, ...

Above I forgot to ask my questions. I'll ask now...

Mark, how is the testing going with the TQ black?

And how do the highs compare to the litz/cotton?

And finally, on your litz cables, how many pieces of shrink tubing do you have, how big are they, and how far are they spaced apart?

[IslandPink]

Hi Charlie
Well, the HF-end of the Blacks is not quite there ( not as good as Bud's litz ) but I've got one length on burn-in with a signal generator currently, as I'm told it takes anywhere from 100-300 hrs at normal volumes to reach its best . I hope it comes around, as the coherence from mids to bass is really something .
For Lynn's benefit, what I'm hearing with this wire is like going from an RC RIAA network to an LCR one, in a phono, in that there is a much better dynamic and tonal integration between the bass and mids .

For info, on the litz, I am currently using what Bud suggested, which is one piece of heatshrink about 1.5" long , every 0.5m or so ( sorry to mix units ) . As I have said, I have no theory at all about what this is doing, except that it makes a big difference to the sound !
It may be that I will experiment a bit more with extra pieces now, given what I've been hearing from the TQ wires.

[Jmmlc]

Hello,

Lot of OT things those last days isn't it?

Le blog de audiobricolos

Best regards from Paris, France

Jean-Michel Le Cléac'h